Die biologische Analyse von Colistin unter Anwendung einer automatischen Apparatur

Ohne Zusammenfassung     

Eine schnelle Bestimmungsm?glichkeit von Wasser in Aceton

Ohne Zusammenfassung     

The absence of surface dipole contributions to metal work functions

A simple model, derived from a linear approximation to the ionization potentials of atoms, is used to compute the work functions of some 43 metals, mostly within their experimental uncertainties. The computation does not make use of a surface dipole contribution. In this respect, it departs from the current literature of many-body theoretical calculations in which the surface dipole plays a major role. Even without the use of surface dipoles, the model can still count for small differences observed on different crystal faces. The model also accounts for the experimental correlations of work functions with half the ionization potential and yields a simple formalism for computing the work functions of metallic clusters. Finally, the model yields the work functions of ions in terms of the same parameter used for the work functions of electrons.     

The Equilibrium Distribution for Free Electrons in a Real Gas

The equilibrium distribution for free electrons in a real gas is derived based on the existence of an interaction potential between a free electron and its nearest neighbor atom (or ion). The form of the interaction potential is inversely proportional to rl where l is a constant; and the derived distribution reduces to the Maxwellian form when the interaction is neglected. It is shown that for most physical situations this interaction potential will only contribute a miniscule change to those electron properties which are dependent upon<|vj?>, j>-3 where is the electron speed.     

Magnetic circular dichroism studies. XXXIII. The MCD spectrum of formaldehyde vapor

The MCD spectrum of formaldehyde in the vapor phase has been measured and analyzed. Triplet bands occur with unusually high ellipticity, allowing identification of several new singlet-triplet bands. Also, an additional singlet progression, based on two quanta of the out-of-plane band and a single quantum of the antisymmetric CH stretch, has been identified.